holtzmann.dk is a .dk domain served by 3 nameservers (ns1.netsite.dk, ns2.netsite.eu, ns3.netsite.se). It was registered on 5 August 2026 (WHOIS) and first appeared in the .dk zone on 6 August 2026. Its website address 185.224.18.200 is hosted by Netsite A/S (AS205206) in Denmark. Mail is handled by mail.protonmail.ch, mailsec.protonmail.ch. The zone is not DNSSEC-signed, publishes a DMARC policy and has no IPv6 address. Below are all of its DNS records from this scan: nameservers, A/AAAA, MX, TXT, SPF, DMARC, CAA, TLSA/DANE, MTA-STS, SRV and more.
| IP | TTL | PTR | ASN | ISP / Org | CIDR | Country | City |
|---|---|---|---|---|---|---|---|
| 185.224.18.200 | 3600s | parked.netsite.host | AS205206 | Netsite A/S | 185.224.16.0/22 | 🇩🇰 Denmark | — |
| TXT Record |
|---|
| protonmail-verification=ade7b42b26f6b20df8230330de76d698be497b12 |
| v=spf1 include:_spf.protonmail.ch mx ~all |
| Policy | Record (holtzmann.dk) |
|---|---|
| ~all (soft fail) | v=spf1 include:_spf.protonmail.ch mx ~all |
| Policy | Record (_dmarc.holtzmann.dk) |
|---|---|
| p=reject | v=DMARC1; p=reject |
| www | 185.224.18.200 (AS205206) (address records, no CNAME) |
| www vs bare domain | Same network |
| Wildcard | No |
| Denial of existence | NSEC zone can be walked (all names enumerable) |
| CDS / CDNSKEY | None 0 CDS, 0 CDNSKEY |
DNS lookups: 3/10 · policy: ~all
No problems found| Service / Owner | Type | Cert association |
|---|---|---|
| SMTP _25._tcp.mail.protonmail.ch | DANE-EE · SPKI · SHA-256 | 76BB66711DA416433CA890A5B2E5A053… |
| SMTP _25._tcp.mail.protonmail.ch | DANE-EE · SPKI · SHA-256 | 6111A5698D23C89E09C36FF833C1487E… |
| SMTP _25._tcp.mailsec.protonmail.ch | DANE-EE · SPKI · SHA-256 | 6111A5698D23C89E09C36FF833C1487E… |
| SMTP _25._tcp.mailsec.protonmail.ch | DANE-EE · SPKI · SHA-256 | 76BB66711DA416433CA890A5B2E5A053… |
| Check | Result |
|---|---|
| Validation Status | 🔓 Insecure |
| AD Flag (resolver validates) | ✗ Not set |
| DS Record | ✗ Not found |
| DNSKEY Record | ✗ Not found |
| Flags | unsigned answer |
| Field | Value |
|---|---|
| Serial | 2026090301 |
| Primary NS (MNAME) | ns1.netsite.dk |
| Responsible (RNAME) | hostmaster@netsite.dk |
| Refresh | 14400s |
| Retry | 3600s |
| Expire | 1209600s |
| Minimum (neg-cache TTL) | 3600s |
| Field | Value |
|---|---|
| Registrar | Netsite A/S |
| Registered | 2026-08-05 |
| Expires | 2027-08-04 (289d) |
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-10-15 07:01:15 | 753ms | 3 NS 1 A 2 MX | 🔒 Secure |
| 2026-10-08 18:15:54 | 1034ms | 3 NS 1 A 2 MX | 🔒 Secure |
| 2026-10-04 17:37:39 | 458ms | 3 NS 1 A 2 MX | 🔒 Secure |
| 2026-10-01 17:33:00 | 529ms | 3 NS 1 A 2 MX | 🔒 Secure |
| 2026-09-30 17:20:05 | 720ms | 3 NS 1 A 2 MX | 🔒 Secure |
| 2026-09-28 15:09:35 | 648ms | 3 NS 1 A 2 MX | 🔒 Secure |
| 2026-09-24 14:24:57 | 675ms | 3 NS 1 A 2 MX | 🔓 Insecure |
| 2026-09-19 17:17:16 | 798ms | 3 NS 1 A 2 MX | 🔓 Insecure |
| 2026-09-06 18:37:33 shown | 866ms | 3 NS 1 A 2 MX | 🔓 Insecure |
| 2026-08-27 16:24:44 | 676ms | 3 NS 1 A 2 MX | 🔓 Insecure |
| 2026-08-20 20:35:07 | 7950ms | 3 NS 1 A 2 MX | 🔓 Insecure |
| 2026-08-13 08:14:43 | 4558ms | 3 NS 1 A 2 MX | 🔓 Insecure |
| 2026-08-12 06:00:39 | 9453ms | 3 NS 1 A 2 MX | 🔓 Insecure |
| 2026-08-09 18:26:41 | 1127ms | 3 NS 1 A 2 MX | 🔓 Insecure |
| 2026-08-06 08:47:07 | 832ms | 3 NS 1 A 1 MX | 🔓 Insecure |